| cutree {stats} | R Documentation |
Cuts a tree, e.g., as resulting from hclust, into several
groups either by specifying the desired number(s) of groups or the cut
height(s).
cutree(tree, k = NULL, h = NULL)
tree |
a tree as produced by hclust. cutree()
only expects a list with components merge, height, and
labels, of appropriate content each. |
k |
an integer scalar or vector with the desired number of groups |
h |
numeric scalar or vector with heights where the tree should be cut. |
At least one of k or h must be specified, k
overrides h if both are given.
cutree returns a vector with group memberships if k or
h are scalar, otherwise a matrix with group meberships is returned
where each column corresponds to the elements of k or h,
respectively (which are also used as column names).
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
hclust, dendrogram for cutting trees themselves.
hc <- hclust(dist(USArrests)) cutree(hc, k=1:5)#k = 1 is trivial cutree(hc, h=250) ## Compare the 2 and 3 grouping: g24 <- cutree(hc, k = c(2,4)) table(g24[,"2"], g24[,"4"])